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Chaparral pea is not established as fire resistant; California guidance raises concern but does not support a firm primary verdict.
The University of California Forest Products Laboratory says chaparral pea was not recommended by three references for use in high-fire-risk areas. Its compilation drew from more than 25 earlier plant lists and classified plants according to repeated favorable, unfavorable, or conflicting recommendations. The report also cautions that the underlying lists often used undefined terms and lacked a scientific basis, so the warning should not be mistaken for a precise measurement of how the shrub burns.
The Diablo Firesafe Council likewise places chaparral pea in its table of plants with unfavorable fire-performance ratings. Its guide mirrors plant lists and supplies the reference key behind them, rather than providing a separate experiment. The council also says the ranking terms in the cited references were mostly undefined. Both sources therefore point toward caution, but their classifications cannot establish a detailed level of flammability.
Chaparral pea is a shrub in the Fabaceae family, native to the Southwestern United States. The evidence is mixed because the unfavorable guidance is meaningful yet limited by the nature of the underlying ratings. Calling chaparral pea fire resistant would claim more certainty than these sources provide.
Form
shrub
Rated in
California
On this lot
1. Fire evidence and conditions
Fire evidence
Mixed evidence — location does not change the cited classification.
The guide presents itself as fire performance ratings for common landscape plants in a fire-prone California setting. FireApproved publishes 104 exact owners as republished California context. It is not an independent rating, a current endorsement, or parcel suitability.
The UC Forest Products Laboratory says the guide covers properties of common California landscaping plants and was prepared for California fire agencies. FireApproved publishes 130 exact owners at historical California publication scope. The report is a 1997 compilation, not a current endorsement, site rating, or independent test of every row.
2. Why this plant is relevant here
State distribution
Documented in CA.
Native range
Current cited native range in CA.
Introduced / established
USDA hardiness
3. Legal, ecological, and broader status
Legal-list status
Seed-list status
Reported invasive here
Broader regional context
Federal context
How to read this page
The status above is computed from the cited rows below: independent recommendations can support a fire-resistant result, an avoid row can produce keep-away, and disagreement stays visible as conflict. Placement notes preserve each source’s own scheme rather than translating unlike rules into one scale. This is evidence about a plant, not permission to plant it in every part of the defensible space; Zone 0 remains noncombustible.
Native and introduced range evidence
These are exact U.S. botanical-area records from the cited range source. Native and
introduced describe biogeographic relationship, not fire performance or planting approval.
Doubtful and extinct rows stay visible but do not count as current presence.
The lossless worldwide derivative is retained once in the research corpus; object pages repeat only exact U.S. areas needed by the local lens. The JSON twin carries the same page assertions.
Where its sources say to plant it
Placement rules below use each source's own distances or named zones, tied to its rating.
They are not interchangeable with the directory's current Zone 0 guidance.
Defensible Space Landscaping in the Urban/Wildland Interf…: Chapter 4, Landscape Vegetation Database [ucfpl-1997] (with its avoid rating)
Fire Performance of Common Plants: Table 2 (unfavorable in 3 or more references) [diablo-guide-to-plants-three-reference-vote] (with its avoid rating)
The evidence
Grouped by what each source concluded. Primary evidence rated the plant itself
(a lab, field program, or original curation); corroboration compiled or
republished another source's rating and resolves to its root lineage.
Fire Performance of Common Plants (Guide to Plants) — Diablo Firesafe Council · live page captured 2026-08-29 · original sourceCorroborationMirrorlineage: ucfpl-berkeley resolves to Defensible Space Landscaping in the Urban/Wildland Interface: A Compilation of Fire Performance Ratings of Residential Landscape Plants
“Table 2: unfavorable fire performance rating in 3 or more references (refs 8,40,41)”
The Diablo Firesafe Council Guide to Plants lists Pickeringia montana (Chaparral pea) as shrub, evergreen, in Table 2: plants with a unfavorable fire performance rating in 3 or more references. The guide cites 3 of its 57 numbered references for this row (8,40,41). The guide states the ranking terms in its underlying references were mostly undefined and makes no attempt to rank within the list, and that fire performance is compromised without maintenance.
